Circuit-controller.



C. L HALL.

CIRCUIT CONTROLLER.

APPLICATION Hum SEPT.25. 1911 Patented Apr. 27, 1915.

2 SHEETS-SHEET l.

Inve r [115ml Hall EB urns 5 C.'|. HALL.

cmcun CONTROLLER.

APPLICATION FILED SEPT.25, I911. 1,137,610, Patented Apr. 27, 1915.

2 SHEETS-SHEET 2.

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qucnt burning of vmxfm'tf in a minimum,

These minim-ts are a e; .mntiwr thcwby The cm'mavts are mm m immune {aha clock m-wenwm miej' 051mm,. IMtwithz-fam? The brush 13 is connected with one of the service mains A and the energizing circuit of the-numeral wheel actuating magnet 16 is connected to the other service main B. The circuit of the electromagnet 16 leads through a brush 17 to the saw-toothed con nector disk 18. It will be noted that the alternate teeth of this disk are under-cut and this for the following reason: The brushes 19 and 20 are adapted to engage the faces of the teeth where they are not thus undercut. If now, we trace the circuit from the main A we shall find that it may lead from brush 13 through the commutator to brush 14, thence-to the brush 20 on the printing attachment, thence through the contact disk; 18 to the brush 17 and thence through the numeral wheel actuating magnet 16 to the negative main B. The closure of this circuit will energize electromagnet 16 to advance the numeral wheels diagrammatically shown at (1 one step. The contact disk 18 bein associated with the units numeral whee is simultaneously advanced wherefore the circuit previously traced from the brush 20 throu h the faceof a tooth of the contact disk is roken.' At the same time a circuit is closed betweenthe brush 19 and the face of the tooth thus brought into engagement with it. The circuit of the electromagnet 16 is not, however, completed until the commutator segment 12 is rotated by the wattmeter into engagement with the brush 15. At this instant, however, the circuit of the electromagnet 16 is again closed to advance the numeral wheel simultaneously to advance the contact disk 18 into position where the circuit through the brush 19 is opene The electromagnet indicated at 20 is -adapted when energized to force the platen 21 into engagement with the paper strip 22, thus bringing it into sharp contact with the type wheels, a typewriter ribbon r intervening to cause the impression to be made in color upon the paper. The circuit of this electromagnet is controlled by time controlling contacts diagrammatically shown M327 and 28. This diagrammatic actuation of these clock controlled contacts does not correspond very .closely with the actual mechanism but the diagram will sufiice to show that when the clock indicated by the dotted line 29 brings the contacts 27 and 28 into engagement with one another, the electromagnet 49 is energized and the circuit through the printing magnet 20 is instan' taneously closed, thus causing the platen to come into play to print upon the paper strip the reading of the numeral wheels-at the particular instant. Thus, in a general way, will be apparent the operation of. the apparatus of my invention. The wattmeter by its commutator controls the advancement of the watt printing numeral wheels. The clock controls the closure of the time circuit to regulate the actuation of the platen to print the re'adings of the numeral wheels upon the record strip.

Referring now to thedetails of the clock driven circuit controller, particular refer ence will be made to Figs. 2 to 6, inclusive. These views illustrate a clock movement at 31. The power springs, gear trains, balance Wheel and regulating mechanism are not shown as these parts have no connection with my present invention. It will suffice, therefore, to, say that the uniform movement of the clock train is through the spindle 32. A clock friction 33 intervenes between this spindle and the minute hand spindle 34.

he hour hand quill 35 is mounted upon the minute hand spindle and connected by ordi' nary 12 to 1 gearing with the minute hand spindle. The intermediate gear and pinion 36 is the point of connection for the circuit controlling unit which I have described. as a self-contained attachment to be secure to the clock which is to be put into the service of my invention. The vital feature ofthe switch is the double involute disk 37 of brass or other suitable metal riveted or otherwise secured to the double involute disk 38 of fiber or other insulating material. The cen ter of the metal involute is cut out so as not to engage the metal hub 39 of the fiber disk. There is an angular displacement between the tips of the metal disk and the associated fiber disk with the result that the fiber disk protects the rim of the metal disk except at the diametrically opposite points at which w the tips of the metal project beyond the tips of the fiber. A. block 40 of insulating material serves as a mount for the pivoted contacts 41 and42. These contracts are each provided with a piece of insulation 41' and 42 to which a spring 42 is fastened, thus tending to hold these contacts inwardly toward the involute disks. Each contact, furthermore, has a projection bent at right angles to the body of the contact, the projcc- 11%.q tions riding upon the rim of the fiber disk except when the tips of the latter reach points at which the ends of the contact levers drop ofl" and onto'the projecting tips of the metal disk. When this occurs an electric circuit is closed between the two lever contacts. This circuit continues closed until one or the other lever drops 03 the tip of metal and onto the rim of insulating ma-- terial. The. parts are so adjusted that the contact 42 drops oif the tip of the metal just slightly in advance of the contact 41, where fore the arcing and burning is confined to the lever 42 which alone serves to break the circuit. The right-angled upper end of the lever contact 42 is slightly extended to carry a bushing 43 of insulating material. This bushing is adapted to be engaged by the depending arm of the bcll-crank lever 43. Thehorizontal arm of this lever is profore, the 'involute disks have vided with a cam surface 44 adapted to be engaged in succession by the pins numbered 10,20, 30, 40, 50 and 60 in the face of the minute plate 45.

pivoted on a suitable stud carried by the back plate 46 of the circuit controlling attachment. A pinion 47 is brought into mesh with the gear of the intermediate idler lictween the minute and hour hands of the 10 clock and the minute plate is mounted upon the hub with this 'pinion 47. The periphery of the-minute plate is gear-cut to mesh with the inion 48 which causes the rotation ol" the involute disks of the switching member. The gear ratios are such that the involute disks make six revolutions during one revolution of the minute plate. The minute plate is provided with a set of twelve equally spaced machine screwfholesand into these holes may be screwed one or more of the pins numbered 10, 20,30, etc. In thedrawing all of the twelve pins are in place in the minute plate. The result of the clockwise rotation of the minute plate'is. tocause the pin marked 10 to engage the cam surface 44 of 'the'bellera'nk lever, thus rotating thisbell crank lever in a clockwise direction against the tension of the comparatively stiff spring mounted on the pivot of the lever. The de- 80 'iending-lever 43 being swung to the left, 1 the contact lever 42 is permitted to drop down .into engagement with the periphcry of the involute disks. When, there rotated 85 to a point at which the tips of the fiber pass the right-angled projections'on the contact-levers,the latter will. drop intoengagement with thetips of the brass diskspas previously'explained, to. close the circuit, Such will be the operation whenever a pin in the minute plate is driven against the cani'surface 44 of the bell crank lever. If, say, the

I pin marked 10' were withdrawn fio'm the minute plate, then the bell crank lever'wonld 45 not be rocked to permit thecontact -l er 42 to come into engagement with th olute disks. Un de'r the-circumstances, th 'rcuit would not be'closed notn-ithstandingthe r0- tation of the involute disks, whilefftlie con-' tact lever 41 would-drop down into hgagement with the metal tip ofthe involutedisk at one side and-the circuit would remain -open at the diametrically opposite The. spring 42 connecting the levers i's .,very, li;ght,

thereby reducing friction'to-af Iriijini'mum',

a'nd'in so far as the lever-42 jis'concerned, thylightness ofthe spring i2? permits the bell crank lever 43, acting under the tension of its spring, to hold the. lever out of engagement with the involute disk.

v It will'b'enoted that the tips of the metal involute are considerably under-cut and the right angled ends of the contact levers are .skewedin such a way that when the contact slefir'drops'over the tip"of"the in'vol'ute a This minute plate 27 and 28.), eurren'tt'will flow through the electromagnet 20 wide quick gap will be formed to prevent the formation of an are which might continue the til-(nit and cause the contacts to he destrzwe a short while. When the and 38. The disk 51 is provided with pins and 54 which are alternately disposed 1n the path of the arm 50 by means of the clock mechanism acting through the. minute plate 45 and pinion 48,;a1 spring 55 rnziintain ing said arm, in its normal position away' from said pins. Now .when a circuit is closed through the involute 37 and the arms 41 and .'(which a-re'shown in Fig. 1' as M This, it will be seen, is practically an instantaneous energization of the electromagnet'and the involutes 37 and 88 will-be rotated approximatelyninety degreesfbepause of the engagement of the bring theeo'ntactfarms out of engagement with thedisk37 when the circuit isopened andftheclock jmechanism continues to rotate "theIdisks-37, 38' and 51 until the circuit-is.

again closed-j Thismovement of approximately-ninety" degrees of these disks 1s not arm'fiO-Witheitheiipm 54 or 53. Thusvthe morethan; w'hatwill takenp the backlash in't-hefgearing' mechanism o'f-ltheclock, and, 1

thus the minute; or hour. hands are not disturhed tliereliry, it"willbe'obvious that. if all twelve-of the pins are screwed into the minute-plate; the circuit control led,by the switch mechanism will hie-energized once in every five minutes, the gear ratios being f f such as tofca-u'se a complete revolution of the involute disks once in every ten minutes,

a d such also as to bring a hole in'the' minute'plateinto' juxtaposition with the cam 4% once in every.five minutes. By omitting alternate pins -from the minute plate the circuit closure will be' effected, oncei'in every. ten'minutes: If everythir'd pin isfinserted in the minute plate, the eircuit will closed every fifteen minutes. {that two d ametri cally. opposite pins remain in the plate the circuit will be closed every half hour. If

a single pin will be secured into the minute plate Itf'wiil be apparent that the pins may the circuit is to be closed but once each-hour, T i

- is ters Patent:

be inserted so as to cause the closure of the in circuit desired within the limits of the mechanism. I t

I have found it convenient'm practice lto 6 control the-time of engagement of the contacts 41 and 42 with the disk 37 by constructing the magnet 49 sothat'its rapidity of operation may be increased-or as desired. If this magnet is'slngglsh in op- 19 eration, which-condition. mayresult' from short circuitiiig a part of it'sturns as indicated at 49km Figml, the time of energizetion of the printing magnet 20 is corre Q vspondingly increased since the energizing current flows through the printing magnet untilthe circuit is opened by the actuation of the controlling magnet49. If on the other hand, it is desired to make the controh,

ling magnet quicker in operation a less number o f its turns may be short circuited, or if -desired,-a part of its magneticpath may be closed throu h the air instead ofthrough .iron or steel. t is desirable thatathe controlling =rnag'net be adjusted to "maintain a a closed circuit through the" printing magnet V for only such. a length of time as is required to positively actuate said. printing magnet,

While I have shown my invention in'the particular embodiments herein shown and so described, it will be understoodthat I may employ equivalent devices for securing the results shown and described without depart ing from the spirit of my invention.

I claim as new and desire to secure by Let- '1. In combination, a switching mechanism, a contact member operated by said switching mechanism, devices for operating said switching mechanism to render said c0n-,

said contact itadt member alternately operative and inop- 1 erative,' and devices actuated by said operatdviees for moving said contact member g-from engagement withsaid switching mechanism. v

...2. In combination, switching mechanism comprising contact members and a connect ing element for establishing electrical connection between said members,lmechanism ;.for operating the switching mechanism so as to alternately establish conne'ction'between embers and break said connection, and devices actuated by said operating mechanism for moving one of said contact vmembers from the path of said element.

3. In combination, contact members, a rotary switching device for alternately establishing connection between said members and breaking said connection, means for operating said rotary device, and mechanism actuated by said operatin means for moving one of said contact mem ers from engagement with said rotary device.

4. In combination, an involute disk, and a contact member engaging the periphery of said disk, thedrop of the involute being cut back on a tangenttoa circle contained by the involute, mechanism for operatingsaid CHESTER LIIALL. Witnesses-z v ALBnR'r'C. BELL, ALBIN C..A HLBERG. 

